package com.base.commons.utils;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;

/**
 * Created by Jen on 2017/8/30.
 */
public class HttpClientUtils {

	private static Logger m_logger = Logger.getLogger(HttpClientUtils.class);
	
	public static String get(String url){
		String responseBody = "";
		CloseableHttpClient httpclient = HttpClients.createDefault();
		HttpGet httpGet = new HttpGet(url);
		try {
			
			// Create a custom response handler
            ResponseHandler<String> responseHandler = new ResponseHandler<String>() {
                public String handleResponse(
                        final HttpResponse response) throws ClientProtocolException, IOException {
                    int status = response.getStatusLine().getStatusCode();
                    if (status >= 200 && status < 300) {
                        HttpEntity entity = response.getEntity();
                        return entity != null ? EntityUtils.toString(entity) : null;
                    } else {
						m_logger.error("Unexpected response status: " + status);
                        throw new ClientProtocolException("Unexpected response status: " + status);
                    }
                }

            };
            
            responseBody = httpclient.execute(httpGet, responseHandler);			
		} 
		catch(Exception e){
			m_logger.error("httpclient get error!"+ e);
		}
		finally {
			try {
				httpclient.close();
			} catch (IOException e) {
				m_logger.error("close httpclient error!"+e);
			}
		}

		m_logger.error("responseBody:"+ responseBody);
		return responseBody;
	}

	public static String post(String url, String param){
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(param);
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(
					new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			m_logger.error("发送 POST 请求出现异常！"+e);
			e.printStackTrace();
		}
		//使用finally块来关闭输出流、输入流
		finally{
			try{
				if(out!=null){
					out.close();
				}
				if(in!=null){
					in.close();
				}
			}
			catch(IOException ex){
				ex.printStackTrace();
			}
		}
		return result;
	}
}

